Hydrocarbon based central system fluid composition

Details Hydrocarbon based central system fluid composition Hydrocarbon based central system fluid composition

1980-08-04

1981-11-10

Weinblatt, Mayer

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

585 7, 585 18, C09K 500

Patent

active

042997143

ABSTRACT:
In a central system fluid composition comprising (1) 70 to 95% by weight of a hydrocarbon base oil and (2) 5 to 30% by weight of a viscosity index improver, the improvement wherein said hydrocarbon base oil (1) comprises (a) 25% by weight to less than 50% by weight, based on the weight of the hydrocarbon base oil (1), of an oligomer of 1-decene having an average molecular weight of 200 to 600 and (b) more than 50% by weight to 75% by weight of a petroleum lubricating oil fraction, and said viscosity index improver (2) is a polymethacrylate having a viscosity average molecular weight of 10,000 to 700,000 obtained by polymerizing at least one ester of a saturated monohydric aliphatic alcohol having 1 to 18 carbon atoms with methacrylic acid.

REFERENCES:
patent: 3763244 (1973-10-01), Shubkin
patent: 4031020 (1977-06-01), Sugiura et al.
patent: 4032591 (1977-06-01), Cupples et al.
patent: 4085056 (1978-04-01), Schenach

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